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3.01 Cell Cycle Lab Report

3.01 The Cell Cycle and Mitosis

Muhammed Hafez

on 14 October 2014

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Transcript of 3.01 Cell Cycle Lab Report

3.01 Cell Cycle Lab Report
By: Muhammed Hafez

Cell Cycle
Safety Notes
- Always handle microscopes and glass slide carefully

- Wash your hands after handling the prepared specimens
- Compound light microscope

- Glass microscope slide with prepared onion root tip specimen
- Understand and identify the stages of the cell cycle and mitosis

- Apply and analytical technique to estimate to relative length of each stage of the cell cycle.
I predict that the time it takes to complete each stage will lower as the phases continue.
Data and Observations
Interphase 34 - 49
Prophase 8 - 13
Metaphase 3 - 4 -
Anaphase 2 - 3
Telophase 2 - 4
Cytokinesis 1 - 3
Data Analysis
Interphase 68% 65%
Prophase 16% 17%
Metaphase 6% 5%
Anaphase 4% 4%
Telophase 4% 5%
Cytokinesis 2% 4%

Based on the data, I can infer that Interphase is the phase that takes the longest. As the phases continue, the time it takes to complete them decreases. The phase that is the shortest is Anaphase. Interphase is the stage that takes the longest because it is the phase in which the cell is developing. Anaphase takes the least amount of time because chromatids are split into chromosomes. The chromosomes are then pulled apart to opposite poles of the cell.

During Interphase, a single cell will have dots and squiggly lines. During Prophase, the chromosomes become visible. Metaphase has the X chromosomes lined up in the middle of the cell. Anaphase has the sister chromotides on opposite sides of the cell. During Telophase, membranes form around the chromosomes. During Cytokinesis is when the cell separates into two separate cells.

Chromosomes will be seen in the nucleus of dividing cells, because they are visible when a cell is dividing, as opposed to non-dividing cells. If my observation had not been restricted to the tip of the onion root the cells that were dividing would be growing. Most cells, besides at the root tips, stay in Interphase. Therefore, if one had been looking at a different part, they probably be in interphase.
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